Peter Gallagher

It looks like 'How I Met Your Mother's Ted is about to get a visit from another Sandy, in an awful joke we hope nowhere to be repeated. But on a more serious note, we've just learned that 'How I Met Your Mother' eighth (and still potentially final) season has added to its guest star ranks once more, casting former 'The O.C.' and current 'Covert Affairs' star Peter Gallagher in a role crucial to Ted (Josh Radnor). Who do you think Gallagher will play, and when might we see him?